Cutting tool



Aug. 30, 1932. H, w PORTER 1,874,616

CUTTING TOOL Aug. 30, 1932. H. w. PORTER CUTTING TOOL vFiled Nov. 18, 1930 "45 .2 and 3, to receive the pivoted portion of Patented Aug. 30, 1932 UNITED g STATES PATENT OFFICE HENRY W. PORTER, OF IBROOKLINE, MASSACHUSETTS, ASSIGNOR TO I-I. K. EoR'ER, INC.,

A CORPORATON 0F MASSACHUSETTS CUTTING VTOOL Application filed November 18, 1930. Serial No. 496,461.

This invention aims toiprovide strong quick l shown merely Vfor illustrative purposes certain embodiments of my invention, wherein:

Figure l is a side elevation of my improved cutting tool;

Fig. 2 is a detail section of one of the ad- Vjusting sections thereof;

Fig. 3 is a detail sectional view of the adjusting section taken on line 3-3Vof Fig. 2; Fig. 4 is a side elevation of a cutting tool i showing a modified arrangement of adjusting sections;

Fig.'5 is a detailed elevation partly in section of one of the adjusting sections of the tool shown in Fig. 4; f

Fig. 6 is a detail transverse section on line I j 0;6-6 of Fig. 5; and

Fig. 7 is a detail transverse section taken on line 7-7 ofy Fig. 5.

v The particular embodiment of the invention selected for purposes of illustration and shown in .the drawings comprises cutting `jaws 1 pivotally connected in cooperative relation by screws 2 and straps 3, although the invention is not limited tothe `particular arrangement shown. l/

The tail ends 4 of the cutting jaws 1, at least when the cutting edges 5 of said cutting aws are in Contact, are arranged inseparated jrelation, and betweenth'ese tails is arranged the pivotal stud 7 which unitesthe handle i '35 members 9.

An adjusting sectionill is interposed beltween the tail 4 of each cutting jaw 'land the Y handle lever 9 therefor. This adjusting secf tion is herein'shown pivotally connected by '40 a screw 13 or other suitablek member to one end of the jaw 1. Said adjustingsection 11 is furthermore pivotally connected at 15 with l its respective handle lever 9. i

Each handle lever is recessed at 17,

said adjusting section, and this recess is eX- tended downwardly of said handle member to enclose the other or free end 19 of the ad- .justingsection 11.

The recess 17 'threads 31 are single and relatively fine of said liandlememberis x desirably extended to the outer edge 21 of the handle lever, thereby greatly-facilitating the mapufacture as well as the assembling of the too f The aforesaid free end 19 of the adjusting section 11 as herein shown has pivotally connected thereto an eye bolt 23 by means of a pivot pin, 25. :Desirably the `free end 19 of said adjusting section 11 is forked at26 to straddle the head`24 of said eye bolt 23. The pin 25 rather tightly fits said eye 24 of said bolt 23 but the ends of said pin are arranged in slots 27 for the purpose hereinafter set forth. The pin 25 although 4in relatively tight fitting relation to the eye 24 is prevented from working out of the forked end 26 by the fact that the lower portion of msA - the recess 17,within which the free end of Asaid adjusting section swings, encloses said forked end and its pivot, and after being assembled said pivot will be prevented from working out of said adjusting sections.

For the purpose of providing quick setting powerful adjusting elements for the adjusting section 11, I desirably provide a sleeve 29 having external screw threads 31 engaging a. relatively fixed part of the handle lever 9, for example the boss 33 formed at the inner edge thereof and within which screw threads are formed to fit said external threads of the sleeve 29. The sleeve 29 is also drilled and tapped axially at 35 and the threads thereof are adapted to fit threads 37 formed upon the shank of said bolt.

The aforesaid sleeve 29 and the eye bolt 23 with their respective screw threads constitute a differential or compound. adjusting means for the swinging of the adjusting section 11 by reason of the fact that the screw threads, whereas those formed uponr the shank of said bolt are at least double threads of opposite pitch and relatively steep. The sleeve 29 is also provided with a polygonal head 39 which projects beyond the boss 33 upon the inside edge of the tool, and upon rotation of this head by a wrench or other tool, formed to itsaid head, a rotary motion will be imparted to said sleeve and thereby eifect a slight aXial. movement thereof inV '3 pitch than the threads on said'sleeve and produce :a ygreater movement of the eye axially than -that produced by the mere rotation of said sleeve. This movement is due to the fact that the eye bolt is prevented from being rotated bythe forked'end of the adjusting section 11.

It will be clearly apparent that the forked end of the member 11 carrying the pivot 'pin 25 will move in an arc struck from the K.axis of the kpivot 15, whereas the eye bolt 23 will vmo've i-n a relatively straight line 4approxi- `nfiately coincident with the axis of the sleeve 29, Iand for this purpose the slots L27 lare provided. n r Y f v Referring now to Figs. 4, 5, 6 `and 7, where- I have illustrated a modiied form of adjusting section for use in connection with a slightly different typeof cutting tool, 41 indicates a -pair of cooperating cutting jaws, herein shown pivotally` connected together rny'screws 43 and straps 45. T he 4tails 47 are 1herein shown pivotally connected, at 49, with Ladiustingfsections k51 whichl in turn are pivotal'ly attached, at 53, to handle levers 55. ln jthe modified form herein referred to I have preferably shown the adjusting section 151 y 'the 'hereinbefore mentioned pivotal conn nection 49, withy the tail 47 of its respective `,cutting jaw. The opposite end of said adjusting section'l is pivotally connected by the Isaid pivot 53y with the handle lever 55 "thereof, The swinging of the adjusting sec-- tion 51 about the axis of the pivot 53 for the purpose of varying the relation of the pivot 49 with the axis oi' the adjust-ing lever 55, herein shown at 59, is elfected by -di-i'erential adjusting means arranged in-termef diate ithe pivots 49 and 53, said diderential adjusting vmeans comprising an eye bolt' 61y -rhaving an eye G3, herein inserted 'fin snugly fitti-ng relation yin a recess y65 formed in a part` of its respective 4handle lever 51. A pin 67 isinserted through said eye'63 and through Slots 69 formed therein. The shank of vsaid bolt is provided with relatively coarse screw threads 71 desirably composed of steep and Iat least double threads. These-threads arearranged in engagement with similarly formed screwvthreads 7 Orinteriorly of a sleeve 73.l

4`onal'head 77 by means of which a rotaryaction -ma-y be imparted thereto. K

The-head 77 of this form of adjusting de- ?C'l viceis, in contradistinction tothe `form shown' Ei'votally connected at its forward end 57, .Y

screw threads formed interiorly of anV r-adjacent edge of the adjusting section 51.

The sleeve 73 also provided with a polygin Figs. 1 and 2, arranged adjacent to the outer edge of the tool although its operation is e'ected in substantially the same manner as that referred to in connection with said Figs. 1 and 2, namely upon each rotation of i the-element 77 the sleeae will ybe moved axially of the .adjusting section 51 a distance equal to the lead of said single threads 75, and this distance plus a distance equal to the lead 'of "said Ydouble `threads on the yshank ofsaid bol't represents the total movement of the .axis of the pivotal connection 67 on an arc swung about the axis of the pivotal connectien 53- Y, o

I By reason of the foregoing constructions it be apparent that the diteren'tiail :devices vdescribed will, because fof the slight turning of the sleeves 29 and 73, produce .a relatively greater movement fof :the voperated by `-said scremanid these screw .means will be powerful., easily operated, fand' capable of withstan ing all iof the pressure likely to be exerted thereupon withoutidanger of breaksingor without undue wear. -f

Thew invention is not limited to ethe-enibodiy ment shown.

. .Iclaimz r il. niazcutting-.toolfof ithe compound 'lever type, in combination with a pivoted cutting jaw lever, the koperating means therefor iill-kv... -cludlng .a handlelever qaroper vand an adjust-"J ing section pivoted thereto, :one of said parts being pivoted to the jaw 'lever andthe other having .a ipivotml bearing ,and a unitary device for relatively adjusting said zhandle levermoo and adjusting section about :their ypivot whereby to position relatiwel7 vthe vother .pivots xof said operating `means kcomprising a bolt fpivoted to one of said parts -tomove the same therewith .in either direction and :ex- ,t tending laterally 1to vone side and a cooperaling nnticamiedfbythe otherrmember to move mheboltinoreout. f

2. In a cutting tool of Ithefcompound `lever type, 'in combination with a :pi'voted cutting jaw devez, the operating .means therefor -ini' cluding z a handleflever proper andfan adjustingsection :pifvoted'theretofone of `said parts being pavoted tothe jww 'lever and :the other h aving a pivotal bearing and a unitaryxdevice 'for relatively 3adjusting said handle .lever i' 'and adjusting section Vabout their fpivot "whnnebyto fposition rrelatively :the `other :pivotspf `said operating means comprising a 'bott'pivoted itok one orfsaid `parts to move \the i same 'therewithyi-:n eitherdirection and .ex-

tending laterally dso oneiside :and afcooperating nut having an lenternal threaded engagement with theotherimemberand adapted on rotation to shift the holt-'either in or out.

a in 'a etang. m1,@ @mamma a' "spivoted cutting gaw lever, a Jpivoted handle lll-:velg :an intermediate adjusting# section pivoted at one end to said jawleverfand at its otherend -to the lhmndle leverl..between the .13"

ends thereof and extending over the side of the handle lever, and a unitary adjustment device located as an entirety between the ends of said adjustment section and engaging the handle lever to move therewith either in oi" out, said device including a single means ef= fecting movement in either direction eX'a posed at the outer sideof the sectioni 4f. 'in a cutting tool of the compound lever type, in combination with a pivoted cutting jaw lever, the operating means therefor including a handle lever proper and an adjusting section pivoted thereto, one of said parts being pivoted to the jaw lever and the other having a pivotal bearing, a bolt cooperating with the tail of said section, one of said parts having a fork-head receiving the other, a pin pivotally connecting them, the handle lever having a pocket receiving the fork-head, a nut cooperating with the bolt and connected to the handle lever alternatively to push or pull on said bolt, the mounting of said bolt and nut having provision permitting the swinging movement of adjusting section when the boit is shifted longitudinally.

5. In a cutting tool of the compound lever type, in combination with a pivoted cutting jaw lever, the operating means therefor including a handle lever proper and an adjusting section pivoted thereto, one of said parts being pivoted to the jaw lever and the other having a pivotal bearing, a bolt pivoted to one of the last recited parts, the pivotal joint being such as to permit relative swinging movement of said part on linear movement of the bolt and a nut cooperating with said bolt carried by the other part and effective on turning movement either to pull or push the same.

6. In a cutting tool of the compound lever type, in combination with a pivoted cutting jaw lever, the operating means therefor including a handle lever proper and an adj usting section pivoted thereto, one of said parts being pivoted to the jaw lever and the other having a pivotal bearing, said section pivoted to the handle member and extending beyond its pivot thereon to provide a tail, said handle lever having an open-sided pocket in which said tail is received, a bolt pivotally jointed to said tail, a cooperating nut connected to the bottom wall of said pocket alternatively to push or pull on said bolt, the mounting of said bolt and nut having provision permit-k ting the swinging movement of the adjusting section when the bolt is shifted longitudinally.

In testimony whereof, I have signed my naine to this specification.

' HENRY W. PORTER. 

